Who is Doña Soledad in the novel, The Eagle’s Gift?

Doña Soledad is an apprentice of the sorcerer Don Juan Matus. She has gone away to the mountains at the opening of The Eagle's Gift, and author Carlos Castaneda without knowing why says that he is the only one who knows her location. She returns as the apprentices are preparing to leave their homes in the unnamed mountain valley. She is much younger and stronger looking than when they see her last and speaks carefully and deferentially to Carlos. It is subsequently revealed that the story of Soledad being Pablito's birth mother is a put-on, an exquisite example of "controlled folly." At Florinda's, while receiving "last-minute instructions," Carlos again meets Soledad, who has spent five years "recapitulating," and has been accepted by the Eagle and set free. Florinda confides that Soledad is the greatest stalker, able to cross the parallel lines any time and has, almost impossibly, found her "parallel being." Thereafter, Carlos deals primarily with Soledad, learning to stop the fog wall but not go through.